Polytomous Models in Computerized Adaptive Testing

Authored by: Aimee Boyd , Barbara Dodd , Seung Choi

Handbook of Polytomous Item Response Theory Models

Print publication date:  April  2010
Online publication date:  January  2011

Print ISBN: 9780805859928
eBook ISBN: 9780203861264
Adobe ISBN: 9781135168728


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Editor Introduction: This chapter shows how many of the models introduced in earlier chapters have been used to extend computerized adaptive testing (CAT) into situations involving polytomous test items. A comprehensive survey of both research-oriented and applied examples of polytomous CAT are provided. Many issues are discussed in this chapter, including exposure control, stop rules, and how to estimate trait location. Additionally, the authors outline how polytomous models have varied in their performance relative to dichotomously scored items.

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